[MacPorts] #59467: ghc @8.6.5_1: Built ghc not working on Catalina

[MacPorts]

#59467: ghc @8.6.5_1: Built ghc not working on Catalina
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  Reporter:  abusse  |      Owner:  essandess
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.6.2
Resolution:          |   Keywords:  catalina
      Port:  ghc     |
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Comment (by essandess):

 Replying to [comment:20 kencu]:
 > I know how haskell generates their prebuilt binary, as I generated 10 of
 them to bring 10.6.8 up to current.

 Ken, how is it done? I assumed that they used a cross-compiler, no? Can
 ghc be compiled from ghc source entirely on macOS?

 If so, and it's easy and robust, that would be preferable to using the
 prebuilt compiler.

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Ticket URL: <https://trac.macports.org/ticket/59467#comment:24>
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